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SETI MB CUDA for Linux
Metod, S56RKO:
--- Quote from: sunu on 25 Aug 2010, 08:34:29 pm ---
--- Quote from: Metod, S56RKO on 25 Aug 2010, 10:20:08 am ---I assume that this flops stuff is more or less aesthetics.
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Absolutely NOT! Check http://lunatics.kwsn.net/3-linux/seti-mb-cuda-for-linux.msg19829.html#msg19829 and http://lunatics.kwsn.net/5-windows/appinfo-flops-question.0.html
--- End quote ---
Well, for me that's more aesthetic than functionality. I'm running SAH along other projects with not-so-high resource share, hence effect of wrong DCF is not so crucial.
--- Quote from: sunu on 25 Aug 2010, 08:34:29 pm ---
--- Quote from: Metod, S56RKO on 25 Aug 2010, 10:20:08 am ---
--- Quote from: sunu on 23 Aug 2010, 12:38:18 pm ---- You have to make the cuda app run at 0 priority. I use the following script that runs in infinite loop:
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Could this be reason for quite long run times on my card?
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Yes, you ABSOLUTELY have to run the cuda app at priority 0.
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Given that CUDA/Win app is generally faster than CUDA/Linux and that peers' GPUs are faster HW-wise than mine, then 5-8 times longer runtimes on my ancient GPU seems reasonable. Even without running CUDA app at priority 0.
Or is it that normal (not niced that is) priority for CUDA app is necessary for flawless operation?
[edit]
Ah, I've read a couple more articles about it and now it became more clear that this helps a lot. At the same time I'll try to lower avg_ncpus and max_ncpus to 0.00. My reasoning: if the task runs with mich higher priority than the rest of CPU-hungry apps, then it'll just steal CPU time from them. Hence no need for BOINC to allocate CPU cycles for it - decent OS tends to do it much better and with much finer granularity.
This might cure my concerns below.
I'll report back with results.
[/edit]
Back to my concerns: what should I put in app_info.xml to make BOINC run 4 CPU tasks and 1 GPU task in parallel? I've got a quad CPU and single GPU so this system should be able to run 5 tasks in parallel. Currently it suspends one CPU task when running the GPU task.
sunu:
All I had to say is in my previous posts http://lunatics.kwsn.net/3-linux/seti-mb-cuda-for-linux.msg30557.html#msg30557 and http://lunatics.kwsn.net/3-linux/seti-mb-cuda-for-linux.msg30659.html#msg30659
riofl:
sheesh. ever since they started this 3days off thing my pending has skyrocketed. is that true for everyone? for the past few weeks i have been hovering between 310,000 and 370,000 !
sunu:
Yes, I'm seeing this also. Before that, I had about 200,000-250,000 pending, now it's about 600,000 pending.
riofl:
i'm currently using nvidia-drivers-195.36.31. noticed an upgrade available to nvidia-drivers-256.52.
i'm always a bit suspicious of large jumps in upgrade versions. worth it? avoid it?
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